give fact that the fuel economy standards aren't fuel economy standards -- [inaudible] said previously about trying to get more drop in fuels to the market would seem to be a way to achieve that standard. if you're going forward in the mid course contradiction, you know, 40 miles per hour with the total renewable meets the goal anyway. so i would like to get your comment on that. also, given the fact that the new turbo charged engine to operate peek efficiency need higher combustion and of course contain. do you have any thought to having a new fuel through tier three that would have the higher of course october -- of blank you're points are excellent ones. i think try to address it to be clear we support the drop in can be properly processed not just arbitrary produce drop in. we have to do it open-mindedly. with a specific of course contain that is dangerous the same carbon tanks. yeah. we could do better with better design fuels, that's for sure. octane is very important, but what we need most is we need to have narrowly specified fuel so we can optimize to that fuel. it doesn't mak